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  • Proteins
    • Length of  amino acid chains
      • 2 amino acids join = Dipeptide
      • more than two amino acids =  polypeptide
      • one or more polypeptide chain = PROTEIN
    • Primary Structure
      • The sequence type and number of amino acids held together by peptide bonds
    • Secondary Structure
      • Hydrogen bonds form between amino acids in the chains
        • Either coiling into an alpha helix or folding into a beta pleated sheet
    • Tertiary Structure
      • Folded and coiled further due to ionic bonds(+-) disulphide bridges, philic & phobic interactions, hydrogen B.
    • Quaternary Structure
      • Determined by the tertiary structure of individual polypeptide chains bonded together


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